Mold for metallic packing



Nov. 17 1925. 1,562,032

w. F. LOHMAN MOL FOR ME'IVALLIC PACKING Filed Jun 1. 1925 INVENTOR Wd/fsf nme/2 ATTORNEY Patented Nov. 17, 1925.

wemelt .JF-...,Loiimeaior starrte-1wasmlsreroir.;

`MoLnroR rlrEaALIrIc PACKING; v

. applmation inea time 1, 19.25i sepial- Nqsfsaese.

To .(ZZfw/om-z't may concern.'

Bent ,known that I ,TWALTEmF LLOHMAJN,`

a citizen .of the UnitedStates, iesi'dingiatc Seattle, in y the county, ofi ,King .andl State.,

of iVashington,` have invented .certain'news` and useful Improvementsv in f'MQlds for Me'- tallicv Packing, of svhiehthe .-olloWingyi-s va specification.

Thi-s .invention :relates .ltogmold-sy for ,cast-1v metal.- contractile packing-rings @for :-piston rods-or thedike;

The y.objeict of; the invention,.,v general-ly,

is :to provide y a .iinolgl :whereby-themaking f of Vringsof this` -ch araeterv wiss facilitated eiv'ithfi a lessening of cost.

Moreafs-peciic, obj ects. of the :invention .will appear fin the, folloiiving..speciicatiorn` The :invention consistsin Vthe; novel con-V struction7 .adaptation7 .arrangement and ,combination ofrfparts hereinafter: describedandclaimed.

In the accompanyingdrawing- Figure 1 is aperspective view of, atypical; L metallic. packing ring. Fign21saaplan=-v1ew i of my improvedfr nold,v for' producing fa .pack-f ing f ring such as; Ashown in Figwl; .the eoverl .f

of the .moldibody being fpantlyhroken-awayq Fig... 3 is. a vertical :transverse .section taken I.. a

substantially v. on broken lines: .-f;3;.-..3 ofofFigi;

2. Fig. 41i-sqauperspective=rview of'sone cof?. the partition elements bf: the; fmoldi Eshovvn 1; in Figs..'2sand;3.i ligfgs isa perspectwe view of anfuncomplete'd paekingfria-ngi.'v Fig): G fis a plan 1 :view showing a v:portion :of/a, moldor a ring offithe ycharac/ter shown 'in Fig. 5."

The, packing.y ring illustrated: in Fig. 1 iis; w

' 31. y:wherebythe .spr-ues j32 vare .severed from theseveral;.sectionswinathe mold When the coverwisrotated .withr.espect itov the body. y

of .known construction,y comprising a .,p'luf rality of arcuate sections 10, having La plane upper sidefll, aspherjicalloxverside. 12,

and a :cylindrical iinnerperifpheral. surface,-

isf prevented Vfrom rotatingasf by means .of

13 the sections ofV .the :ring fbeing connected in spaced apar-t relations bynieans of' Wire slot xauch aszindicated, for example, by inia coupling elements 14::Whose lends are ,em-V

' bedded in the ends ofthe respective'sections.

In, carryingI out Jthe present finvention I provide' a l mold consisting,- asfeshownfiof a f cover'A securing nut 24 Vand `a :stud .'36 which metal b ody 15, l preferably offia cylindrical sha-pe, having a plane upper surface 216 "and f body; irecess-above referred. to is a-cylindr-ical metalli-block 20 or c0r.e,v,.vas iitmvill be4 termed hereinafter,I of 4a height correspond- 1ng;.to.the .depth of said recesstofhavewthe.V

upperisurface'. 21oethe Acoreain a .plane Iwith l.

the :upper sur-face 16v yof `the body.l The` core isheld centrally;ofy the recess .by means ofva pin r or bolt y22 tting Lin; axially: aligned holesmof thee bodyiand.- core. .Rtatjablyf mounted .upon the boltil22i is a ,plate .coverY which is held in juxtaposition With-said:

body andncore zmembersibyizanyesuitaible means, nthe; illustrated ineanssbeing :1a winged nut-,241I engaging the s cr'evvf;:.threalv :endf125 said nut andpcover.V VThe bodygliand the core 20 are ff provided r 'with Ycomplementary titions serving todividefthennnular spiace,`

surrounding the core int01-.a, number.v i .of matricesein E whichi :are cast; i .the respectivesectionsof a packing ring sllchzasshovvn in llv-lukglll..y I i. i

Each :of: saidf partitions is providedi with a notch 29 to accommodate a couplingfwire.l

14 svhose. rendal extend ilaterally c from 1 the respective partition-nto i bei `embedded in the l molten metal; which fpouredi inta the ...mate

ricos;

The pouring of theeinetal,abovemeferr'edto is effected through gates SOprovided in the.: cover, .one i above :each: matrix,prefer iablyf AAsshowlmsaidf gates areieach'ofQan inverted truncated f-conicali shape to afford at: :the bottoml of the .f cover a cutting ...edge

`In suche'shearinguoperationwthe body 15 its'rlugs :1? engaging :Within apertures orl a support For rotating thelzcover .theremay be.:y employ/edy a bar 135 engaging for :instance the is rigid With the `.cover-L rInltheoperation of thefabove describedl 23 is then mounted upon the bolt and secured to the mold body and its core by means of the nut 24.

Thus assembled, the molten metal is poured through the respective gates 30 into the matrices to fill the' latter. After the metal poured into the mold becomes sufficiently solidified, the cover 23 is rotated about the bolt 22 acting as a spindle to effect by means of the shear` edges 31 the cutting off of the sprues from the respective ring-sections flush With the plane surfaces 11 thereof.

An advantageous manner of manufacturing a packing ring such as shown in Fig. 1 is to primarily cast the sections in a single piece as shown in Fig. 5 with a continuous inner portion 131, which inner portion is subsequently bored or otherwise machined to afford an inner opening of a diameter to include the inner ends of radially dis-posed slots Ll0.

This method affords an advantageous means to provide a casting with a stock size outer diameter and which may be conveniently held in a chuck for machining to produce sections of various selected inner radii.

In making an integral casting .of the character shown in Fig. 5 the core 2O1 of the mold, Fig. 6, is unprovided with any slots for the partitions, each partition as 281 being regulated to extend but part Way across the metal receiving matrix of the mold body. Otherewise the mold and manner of employing` the same is similar, or substantially so, to the above described mold in which is cast a packing ring composed of sections.

TWhile I have illustrated an described the preferred embodiments of my invention, I do not Wish to be understood as confining myself specifically thereto except as limited by the appended claims.

`What I claim, is,

1. In a mold, a body having a circular recess therein, a core provided Within said recess, a means engaging the core for po sitioning the same centrally of the recess.- a cover for the body rotatably mounted upon said core positioning means, said corer having gates therein which communicate with said recess, cutting means provided at the under surface of the cover, and means to rotate the cover for actuating said cutting means to separate the sprues within the respective gates from the casting 1vithin the mold recess. Y

In a mold, a chambered body, a core provided Within the chamber of said body, a pin for positioning said core centrally of the chamber, partition plates extending radially of the mold into said chamber, a cover for the body, said cover being rotataly mounted upon said pin, said cover being reaosa provided with a gate formed to afford a metal shearing edge at the under surface of the cover, and means to impart rotary movement to the cover for removing the sprue Within the gate from the casting Within the body chamber. I

3. In a mold of the character described, the combination with a body member provided With a circular recess, a cylindrical core provided Within said recess, a pin for po` sitioning the core centrally of said recess, and partitions dividing the annular space surrounding the core into a plurality of matrices, of a cover surmounting the body and core and rotatively mounted upon said pin, means provided upon thepin for securing the cover to the body and to the core, said cover being provided With gates through which molten metal is poured into the respective matrices, said gates being formed to provide the cover with metal shearing edges, and means for rotating said cover to cause said shearing edges to sepa-rate the sprues from the casting Within the respective matrices.

Ll. In a mold of the character described, the combination With a bodymember provided With acircular recess, a cylindrical core provided Within said recess,` a pin for positioning the core centrally of said recess, said body and core being provided with coniplementary slots disposed radially of the mold axis, and partitions engaging in said slots to couple the core to said body against independent rotary movement, said partitions also serving to divide the annular space surrounding the core into a plurality of matrices, of acover'surmounting the body and core and rotatively mounted upon said pin, means associated with the pin for securing the cover to the body and core, said cover being provided with gates through which molten metal is poured into the respective matrices, said gates being formed to provide the cover With metal shearing edges, and means for rotating said cover to cause said shearing edges to separate the sprues from the casting Within the respec tive matrices.

5. The combination With a mold having` an annular recess therein divided into a plurality of circumferentially disposed matrices, of a cover for said mold, said cover being provided with a plurality of gates through which molten metal is poured into the respective matrices and ad'ording shearing edges at the under side of the cover, and means disposed axially of the mold recess for coupling the cover to the. mold, said means also serving as a pivot for the cover.

Signed at Seattle, Vilashington, this 16th day of May 1925.

WALTER F. LOHMAN. 

